Working knowledge of: energy management systems including the ability to understand and use system features; and a general knowledge of the applicable state and federal safety codes and regulations pertaining to mechanical and HVAC systems; HVAC controls (DDC and pneumatic), large air handling systems, Dual-duct, VAV, CAV, single zone, multi-zone, hot water & electric reheat, DX equipment, split, package, mini-split, exhaust systems, hydronic systems; chilled and hot water pumps and piping, and Variable Frequency Drives. Ability to: install, operate and repair HVAC equipment and systems; demonstrate a high degree of mechanical skill equivalent to journey-level in one or more related trades such as plumbing, pipe fitting, electrical, or air conditioning; read, interpret and work from blueprints, plans, drawings and specifications; make rough sketches; estimate cost, time and materials of mechanical work.